Latch.



No. 809,534. PATENTED JAN. 9, 1906.

YA. SHBPARD.

LATCH. APPLIoATIoN FILED APRA. 1905.

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UNITED STATES PATENT orifice.

& ERWlN MANUFACTURING COMPANY, OF NEIV BRITAIN, CONNECTI- CUT, A CORPORATION.

LATCH.

No. 809,534.A

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application led April 4, 1905. Serial No 253,750.

To all whom it may con/cern:

Be it known that I, AMos SHEPARD, a citi- Zen of the United States, residing at Plantsville, in the county of Hartford and State of Connecticut, have invented certain new and? useful Improvements in Latches, of which? the following is a'specification.

' My invention relates to improvements in4 latches and the main objects of my improvement are simplicity and economy in construction and convenience and efficiency in use, and particularly when the latch mechan-f ism is arranged in the same case as the lockl mechanism.

In the accompanying drawings, Figure 1 is a face view of my latch with the cap or front plate removed. Fig. 2 is a like view of the same with the moving parts in the lock mech-l anism removed and with the roll-back shown4 partly in broken section. Fig. 3 is a view corresponding to Fig. 2, but with the rollback turned so as to withdraw the latch-bolt. Fig. 4 is a sectional view on the line a: of Fig. 1, and Fig. 5 is a view corresponding to Fig. 1 and illustrating a modification.

The body of the latch-case A, its cap B and essential, as any ordinary form of stops may be employed to limit the inward movement of the latch-bolt. As shown, the said latchbolt is provided with an oriiice 8, which is engaged by a projection 9 on the end of the lever 10, which lever is pivoted to the lock-case by means of the stud 11 and is pressed upon by the spring-arm 12 with a constant tendency to hold the latch-bolt in its projected position. This connection of the latch-bolt and lever acts to guide the inner end of the latch-bolt against undue vertical movement, while the engagement of the projection 9 and front and rear walls of the orifice 8 serve to necessitate the inward movement of the latch-bolt when the upper end of the said lever is forced inwardly, as hereinafter described, and to necessitate the inward movement of the upper end of the said lever when the latch-bolt is pushed inwardly from the outside, whereby the spring-arm 12 is put under tension to project the latch-bolt. In

' order to simplify the construction, I pivot the lever 10 on the same stud as that on which the tumbler lf3-and spring 14 of the lock-bolt l5 is mounted, the said lock mechanism being of ordinary construction.

D designates the hub or roll-back, which is in the main of an ordinary construction,

i mounted on trunnions in the two plates of the latch and provided with the usual spindlehole and two wings 16. I also provide the said roll-back with a guard 17, which is in the form of a flange extending from wing towing in a plane a little to one side of the engaging faces of the said wings. The lower end of a slide 18 is provided with an end face that engages a seat 19 on the lever 10, while the opposite end of the said slide is provided with two arms 20, having end faces that are engaged by the wings 16 of the roll-back, whereby a movement of the roll-back in either direction will move the slide in the direction for engaging the lever 10 to withdraw the latch-bolt. A spring-arm 2l acts upon the slide 18 with a tendency to force the said slide in the opposite direction from that in which it is moved by the roll-back, thereby acting to return the roll-back to its normal position. I have described the spring-arms 12 and 21 separately, because except for the sake of economy they might be two separate springs, although I have formed these two arms of one piece of metal, so that there is only one spring in the latch operating mechanism.

The two springarms normally hold the moving parts of the latch mechanism in the position shown in Figs. 1 and 2. A movement of the roll-back in either direction will cause one or the other of its wings 16 to engage one or the other of the arms 2O of the slide 18 and force the lower end of the said slide against the seat 19 on the lever 10 and move the said lever in the direction for drawing in the latch-bolt, as shown in Fig. 3. In this Fig. 3 the Wing of the roll-back that lies on the left of the aXis of the roll-back is the one that is in engagement with the slide. The

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same result is effected when the roll-back is turned the proper distance in the opposite direction, only in that case the slide would stand at a slightly-Varying incline from that shown in the said Fig. 3. Upon releasing the roll-back the spring or springarms act to restore the parts to their normal position. When the latch-bolt is forced inwardly from its outer end, the lever 10 moves to put the spring-arm 12 under tension, while slide 18 and rollbacl are idle.

The usual post having a threaded hole to receive the screw that holds on the cap is designated by the numeral 22. As before noted, the lever l0 is pivoted on the usual tumblern post 11. It may also be noted that the spring is in part held by the usual guide 23 for the lock-bolt and that the projection 24 for use in connection with the said guide 23 in holding the spring is the only projection, stud, or post that is employed especially for the latch mechanism, whereby I have greatly simplified the construction. The latch-bolt is stopped in its inward movement by the engagement of one of stop -wings 7 with the edge of the guard 17 of the roll-back. The guard `17 prevents the two-armed end of the slide 1S from moving sidewise out of place. In addition to simplicity and economy of construction the spring acts lightly for forcing the latch-bolt outwardly, so that it may be pushed in easily, while the action of the spring on the slide and roll-back is stronger and is always strong enough to insure the return of the slide and roll-bacl{. The rollback is placed close to the upper edge of the lock-case, and at the same time the latch-op erating mechanism is simple and effective.

The construction illustrated in Fig. 5 is substantially the same with the difference that the roll-back acts to pull the slide upwardly instead of to push it downwardly. When the parts are identical, I have employed the same reference characters, and the other parts I have given the same reference characters with the addition of the letter a The two arms of the slide 18u pass under or behind the wings 16EL of the roll-back Da substantially as in an ordinary roll-back and slide. so that no special guard is required. The two arms 20u of the said slide 18a are offset toward the front in order to make them engage the farther edge of the wings 16a. The latch-bolt is stopped in its inward movement by the engagement of one of the lugs 6 with the confronting edge of the slide 18a.

I claim as my invention l 1. The combination of a latch-bolt with a lever operatively connected with the said latch-bolt and pivoted to the latch-case, a roll-back having two wings, a slide for engaging the said lever, the said s lide having two arms for engagement with the wings of the said roll-back, and spring-arms acting on the said lever and slide to return the parts to their normal position.

2. The combination of a latch-bolt with a spring-pressed lever operatively connected with the said latch-bolt, a roll-back having two wings, and a spring-pressed slide interposed between the said roll-back and lever and acting to operate the said lever in the direction for withdrawing the latch-bolt when the roll-back is turned in either direction.

3. The combination of a latch-bolt with a spring-pressed lever operatively connected with the said latch-bolt, a roll-back having two wings, and a spring-pressed slide interposed between the said roll-back and lever and having two end faces at one end and one end face on the opposite end, the three end faces of the said slide being in position for engagement with the said wings and lever.

4. The combination of the latch-case with a latch-bolt, a spring-pressed lever pivoted on the tumbler-post of the said latch-case with the free end of the said lever operatively connected with the said latch-bolt, a rollback, and a spring-pressed slide operatively connecting the said roll-back and lever, whereby the said slide is moved in a direction to withdraw the latch-b olt when the rollback is turned in either direction.

5. The combination of a latch-bolt with a lever pivoted to the latch-case and operatively connected with the said lever, a rollback having two wings, a slide interposed between the said roll-back and lever, and a single spring with one arm pressing against the said lever to move it toward the said slide, and with its other arm pressing against the said slide to move it toward the said roll back.

AMOS SHEPARD.

Witnesses:

JAMEs SHEPARD, CHARLES M. NEwELL.

TOC 

